Commit | Line | Data |
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3e7ee490 HJ |
1 | /* |
2 | * | |
3 | * Copyright (c) 2009, Microsoft Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
17 | * | |
18 | * Authors: | |
19 | * Haiyang Zhang <haiyangz@microsoft.com> | |
20 | * Hank Janssen <hjanssen@microsoft.com> | |
21 | * | |
22 | */ | |
23 | ||
5654e932 | 24 | #include <linux/kernel.h> |
0ffa63b0 | 25 | #include <linux/mm.h> |
4983b39a | 26 | #include "osd.h" |
645954c5 | 27 | #include "logging.h" |
3e7ee490 HJ |
28 | #include "VersionInfo.h" |
29 | #include "VmbusPrivate.h" | |
30 | ||
454f18a9 BP |
31 | |
32 | /* Globals */ | |
33 | ||
3e7ee490 HJ |
34 | static const char* gDriverName="vmbus"; |
35 | ||
454f18a9 BP |
36 | /* Windows vmbus does not defined this. |
37 | * We defined this to be consistent with other devices | |
38 | */ | |
39 | /* {c5295816-f63a-4d5f-8d1a-4daf999ca185} */ | |
caf26a31 GKH |
40 | static const struct hv_guid gVmbusDeviceType = { |
41 | .data = { | |
42 | 0x16, 0x58, 0x29, 0xc5, 0x3a, 0xf6, 0x5f, 0x4d, | |
43 | 0x8d, 0x1a, 0x4d, 0xaf, 0x99, 0x9c, 0xa1, 0x85 | |
44 | } | |
3e7ee490 HJ |
45 | }; |
46 | ||
454f18a9 | 47 | /* {ac3760fc-9adf-40aa-9427-a70ed6de95c5} */ |
caf26a31 GKH |
48 | static const struct hv_guid gVmbusDeviceId = { |
49 | .data = { | |
50 | 0xfc, 0x60, 0x37, 0xac, 0xdf, 0x9a, 0xaa, 0x40, | |
51 | 0x94, 0x27, 0xa7, 0x0e, 0xd6, 0xde, 0x95, 0xc5 | |
52 | } | |
3e7ee490 HJ |
53 | }; |
54 | ||
775ef25e | 55 | static struct hv_driver *gDriver; /* vmbus driver object */ |
3d3b5518 | 56 | static struct hv_device* gDevice; /* vmbus root device */ |
454f18a9 BP |
57 | |
58 | ||
3e7ee490 | 59 | |
454f18a9 | 60 | /* Internal routines */ |
3e7ee490 | 61 | |
3e7ee490 | 62 | |
ee3d7ddf | 63 | static void VmbusGetChannelInterface(struct vmbus_channel_interface *Interface); |
3e7ee490 HJ |
64 | |
65 | static void | |
66 | VmbusGetChannelInfo( | |
3d3b5518 | 67 | struct hv_device *DeviceObject, |
ee3d7ddf | 68 | struct hv_device_info *DeviceInfo |
3e7ee490 HJ |
69 | ); |
70 | ||
71 | static void | |
72 | VmbusGetChannelOffers( | |
73 | void | |
74 | ); | |
75 | ||
76 | static int | |
77 | VmbusOnDeviceAdd( | |
3d3b5518 | 78 | struct hv_device *Device, |
3e7ee490 HJ |
79 | void *AdditionalInfo |
80 | ); | |
81 | ||
82 | static int | |
83 | VmbusOnDeviceRemove( | |
3d3b5518 | 84 | struct hv_device *dev |
3e7ee490 HJ |
85 | ); |
86 | ||
87 | static void | |
88 | VmbusOnCleanup( | |
775ef25e | 89 | struct hv_driver *drv |
3e7ee490 HJ |
90 | ); |
91 | ||
92 | static int | |
93 | VmbusOnISR( | |
775ef25e | 94 | struct hv_driver *drv |
3e7ee490 HJ |
95 | ); |
96 | ||
97 | static void | |
98 | VmbusOnMsgDPC( | |
775ef25e | 99 | struct hv_driver *drv |
3e7ee490 HJ |
100 | ); |
101 | ||
102 | static void | |
103 | VmbusOnEventDPC( | |
775ef25e | 104 | struct hv_driver *drv |
3e7ee490 HJ |
105 | ); |
106 | ||
107 | /*++; | |
108 | ||
109 | Name: | |
110 | VmbusInitialize() | |
111 | ||
112 | Description: | |
113 | Main entry point | |
114 | ||
115 | --*/ | |
116 | int | |
117 | VmbusInitialize( | |
775ef25e | 118 | struct hv_driver *drv |
3e7ee490 HJ |
119 | ) |
120 | { | |
ee3d7ddf | 121 | struct vmbus_driver *driver = (struct vmbus_driver *)drv; |
3e7ee490 HJ |
122 | int ret=0; |
123 | ||
124 | DPRINT_ENTER(VMBUS); | |
125 | ||
126 | DPRINT_INFO(VMBUS, "+++++++ Build Date=%s %s +++++++", VersionDate, VersionTime); | |
127 | DPRINT_INFO(VMBUS, "+++++++ Build Description=%s +++++++", VersionDesc); | |
128 | ||
129 | DPRINT_INFO(VMBUS, "+++++++ Vmbus supported version = %d +++++++", VMBUS_REVISION_NUMBER); | |
130 | DPRINT_INFO(VMBUS, "+++++++ Vmbus using SINT %d +++++++", VMBUS_MESSAGE_SINT); | |
131 | ||
b7d7ae6f | 132 | DPRINT_DBG(VMBUS, "sizeof(VMBUS_CHANNEL_PACKET_PAGE_BUFFER)=%zd, sizeof(VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)=%zd", |
3fcc523a | 133 | sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER), sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER)); |
3e7ee490 HJ |
134 | |
135 | drv->name = gDriverName; | |
caf26a31 | 136 | memcpy(&drv->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid)); |
3e7ee490 | 137 | |
454f18a9 | 138 | /* Setup dispatch table */ |
3e7ee490 HJ |
139 | driver->Base.OnDeviceAdd = VmbusOnDeviceAdd; |
140 | driver->Base.OnDeviceRemove = VmbusOnDeviceRemove; | |
141 | driver->Base.OnCleanup = VmbusOnCleanup; | |
142 | driver->OnIsr = VmbusOnISR; | |
143 | driver->OnMsgDpc = VmbusOnMsgDPC; | |
144 | driver->OnEventDpc = VmbusOnEventDPC; | |
145 | driver->GetChannelOffers = VmbusGetChannelOffers; | |
146 | driver->GetChannelInterface = VmbusGetChannelInterface; | |
147 | driver->GetChannelInfo = VmbusGetChannelInfo; | |
148 | ||
454f18a9 | 149 | /* Hypervisor initialization...setup hypercall page..etc */ |
3e7ee490 HJ |
150 | ret = HvInit(); |
151 | if (ret != 0) | |
152 | { | |
153 | DPRINT_ERR(VMBUS, "Unable to initialize the hypervisor - 0x%x", ret); | |
154 | } | |
155 | ||
156 | gDriver = drv; | |
157 | ||
158 | DPRINT_EXIT(VMBUS); | |
159 | ||
160 | return ret; | |
161 | } | |
162 | ||
163 | ||
164 | /*++; | |
165 | ||
166 | Name: | |
167 | VmbusGetChannelOffers() | |
168 | ||
169 | Description: | |
170 | Retrieve the channel offers from the parent partition | |
171 | ||
172 | --*/ | |
173 | ||
174 | static void | |
175 | VmbusGetChannelOffers(void) | |
176 | { | |
177 | DPRINT_ENTER(VMBUS); | |
178 | VmbusChannelRequestOffers(); | |
179 | DPRINT_EXIT(VMBUS); | |
180 | } | |
181 | ||
182 | ||
183 | /*++; | |
184 | ||
185 | Name: | |
186 | VmbusGetChannelInterface() | |
187 | ||
188 | Description: | |
189 | Get the channel interface | |
190 | ||
191 | --*/ | |
ee3d7ddf | 192 | static void VmbusGetChannelInterface(struct vmbus_channel_interface *Interface) |
3e7ee490 HJ |
193 | { |
194 | GetChannelInterface(Interface); | |
195 | } | |
196 | ||
197 | ||
198 | /*++; | |
199 | ||
200 | Name: | |
ee3d7ddf | 201 | VmbusGetChannelInfo() |
3e7ee490 HJ |
202 | |
203 | Description: | |
204 | Get the device info for the specified device object | |
205 | ||
206 | --*/ | |
207 | static void | |
208 | VmbusGetChannelInfo( | |
3d3b5518 | 209 | struct hv_device *DeviceObject, |
ee3d7ddf | 210 | struct hv_device_info *DeviceInfo |
3e7ee490 HJ |
211 | ) |
212 | { | |
213 | GetChannelInfo(DeviceObject, DeviceInfo); | |
214 | } | |
215 | ||
216 | ||
217 | ||
218 | /*++ | |
219 | ||
220 | Name: | |
221 | VmbusCreateChildDevice() | |
222 | ||
223 | Description: | |
224 | Creates the child device on the bus that represents the channel offer | |
225 | ||
226 | --*/ | |
227 | ||
daaa8cc3 GKH |
228 | struct hv_device *VmbusChildDeviceCreate(struct hv_guid *DeviceType, |
229 | struct hv_guid *DeviceInstance, | |
f346fdc2 | 230 | void *Context) |
3e7ee490 | 231 | { |
ee3d7ddf | 232 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
3e7ee490 HJ |
233 | |
234 | return vmbusDriver->OnChildDeviceCreate( | |
235 | DeviceType, | |
236 | DeviceInstance, | |
237 | Context); | |
238 | } | |
239 | ||
240 | ||
241 | /*++ | |
242 | ||
243 | Name: | |
244 | VmbusChildDeviceAdd() | |
245 | ||
246 | Description: | |
247 | Registers the child device with the vmbus | |
248 | ||
249 | --*/ | |
f346fdc2 | 250 | int VmbusChildDeviceAdd(struct hv_device *ChildDevice) |
3e7ee490 | 251 | { |
ee3d7ddf | 252 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
3e7ee490 HJ |
253 | |
254 | return vmbusDriver->OnChildDeviceAdd(gDevice, ChildDevice); | |
255 | } | |
256 | ||
257 | ||
258 | /*++ | |
259 | ||
260 | Name: | |
261 | VmbusChildDeviceRemove() | |
262 | ||
263 | Description: | |
264 | Unregisters the child device from the vmbus | |
265 | ||
266 | --*/ | |
f346fdc2 | 267 | void VmbusChildDeviceRemove(struct hv_device *ChildDevice) |
3e7ee490 | 268 | { |
ee3d7ddf | 269 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
3e7ee490 HJ |
270 | |
271 | vmbusDriver->OnChildDeviceRemove(ChildDevice); | |
272 | } | |
273 | ||
274 | /*++ | |
275 | ||
276 | Name: | |
277 | VmbusChildDeviceDestroy() | |
278 | ||
279 | Description: | |
280 | Release the child device from the vmbus | |
281 | ||
282 | --*/ | |
454f18a9 BP |
283 | |
284 | /* ************** | |
285 | void | |
286 | VmbusChildDeviceDestroy( | |
3d3b5518 | 287 | struct hv_device *ChildDevice |
454f18a9 BP |
288 | ) |
289 | { | |
ee3d7ddf | 290 | struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver; |
454f18a9 | 291 | |
ee3d7ddf | 292 | vmbusDriver->OnChildDeviceDestroy(ChildDevice); |
454f18a9 BP |
293 | } |
294 | ************* */ | |
3e7ee490 HJ |
295 | |
296 | /*++ | |
297 | ||
298 | Name: | |
299 | VmbusOnDeviceAdd() | |
300 | ||
301 | Description: | |
302 | Callback when the root bus device is added | |
303 | ||
304 | --*/ | |
305 | static int | |
306 | VmbusOnDeviceAdd( | |
3d3b5518 | 307 | struct hv_device *dev, |
3e7ee490 HJ |
308 | void *AdditionalInfo |
309 | ) | |
310 | { | |
4d643114 | 311 | u32 *irqvector = (u32*) AdditionalInfo; |
3e7ee490 HJ |
312 | int ret=0; |
313 | ||
314 | DPRINT_ENTER(VMBUS); | |
315 | ||
316 | gDevice = dev; | |
317 | ||
caf26a31 GKH |
318 | memcpy(&gDevice->deviceType, &gVmbusDeviceType, sizeof(struct hv_guid)); |
319 | memcpy(&gDevice->deviceInstance, &gVmbusDeviceId, sizeof(struct hv_guid)); | |
3e7ee490 | 320 | |
454f18a9 BP |
321 | /* strcpy(dev->name, "vmbus"); */ |
322 | /* SynIC setup... */ | |
3e7ee490 HJ |
323 | ret = HvSynicInit(*irqvector); |
324 | ||
454f18a9 | 325 | /* Connect to VMBus in the root partition */ |
3e7ee490 HJ |
326 | ret = VmbusConnect(); |
327 | ||
454f18a9 | 328 | /* VmbusSendEvent(device->localPortId+1); */ |
3e7ee490 HJ |
329 | DPRINT_EXIT(VMBUS); |
330 | ||
331 | return ret; | |
332 | } | |
333 | ||
334 | ||
335 | /*++ | |
336 | ||
337 | Name: | |
338 | VmbusOnDeviceRemove() | |
339 | ||
340 | Description: | |
341 | Callback when the root bus device is removed | |
342 | ||
343 | --*/ | |
bd1de709 | 344 | static int VmbusOnDeviceRemove( |
3d3b5518 | 345 | struct hv_device *dev |
3e7ee490 HJ |
346 | ) |
347 | { | |
348 | int ret=0; | |
349 | ||
350 | DPRINT_ENTER(VMBUS); | |
351 | ||
352 | VmbusChannelReleaseUnattachedChannels(); | |
353 | ||
354 | VmbusDisconnect(); | |
355 | ||
356 | HvSynicCleanup(); | |
357 | ||
358 | DPRINT_EXIT(VMBUS); | |
359 | ||
360 | return ret; | |
361 | } | |
362 | ||
363 | ||
364 | /*++ | |
365 | ||
366 | Name: | |
367 | VmbusOnCleanup() | |
368 | ||
369 | Description: | |
370 | Perform any cleanup when the driver is removed | |
371 | ||
372 | --*/ | |
bd1de709 | 373 | static void |
3e7ee490 | 374 | VmbusOnCleanup( |
775ef25e | 375 | struct hv_driver *drv |
3e7ee490 HJ |
376 | ) |
377 | { | |
ee3d7ddf | 378 | /* struct vmbus_driver *driver = (struct vmbus_driver *)drv; */ |
3e7ee490 HJ |
379 | |
380 | DPRINT_ENTER(VMBUS); | |
381 | ||
382 | HvCleanup(); | |
383 | ||
384 | DPRINT_EXIT(VMBUS); | |
385 | } | |
386 | ||
387 | ||
388 | /*++ | |
389 | ||
390 | Name: | |
391 | VmbusOnMsgDPC() | |
392 | ||
393 | Description: | |
394 | DPC routine to handle messages from the hypervisior | |
395 | ||
396 | --*/ | |
bd1de709 | 397 | static void |
3e7ee490 | 398 | VmbusOnMsgDPC( |
775ef25e | 399 | struct hv_driver *drv |
3e7ee490 HJ |
400 | ) |
401 | { | |
402 | void *page_addr = gHvContext.synICMessagePage[0]; | |
403 | ||
eacb1b4d GKH |
404 | struct hv_message *msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
405 | struct hv_message *copied; | |
3e7ee490 HJ |
406 | while (1) |
407 | { | |
454f18a9 | 408 | if (msg->Header.MessageType == HvMessageTypeNone) /* no msg */ |
3e7ee490 HJ |
409 | { |
410 | break; | |
411 | } | |
412 | else | |
413 | { | |
eacb1b4d | 414 | copied = kmalloc(sizeof(*copied), GFP_ATOMIC); |
3e7ee490 HJ |
415 | if (copied == NULL) |
416 | { | |
417 | continue; | |
418 | } | |
419 | ||
eacb1b4d | 420 | memcpy(copied, msg, sizeof(*copied)); |
de65a384 BP |
421 | osd_schedule_callback(gVmbusConnection.WorkQueue, |
422 | VmbusOnChannelMessage, | |
423 | (void *)copied); | |
3e7ee490 HJ |
424 | } |
425 | ||
426 | msg->Header.MessageType = HvMessageTypeNone; | |
427 | ||
454f18a9 BP |
428 | /* |
429 | * Make sure the write to MessageType (ie set to | |
430 | * HvMessageTypeNone) happens before we read the | |
431 | * MessagePending and EOMing. Otherwise, the EOMing | |
432 | * will not deliver any more messages since there is | |
433 | * no empty slot | |
434 | */ | |
28b6ca9c | 435 | mb(); |
3e7ee490 HJ |
436 | |
437 | if (msg->Header.MessageFlags.MessagePending) | |
438 | { | |
454f18a9 BP |
439 | /* |
440 | * This will cause message queue rescan to | |
441 | * possibly deliver another msg from the | |
442 | * hypervisor | |
443 | */ | |
a51ed7d6 | 444 | wrmsrl(HV_X64_MSR_EOM, 0); |
3e7ee490 HJ |
445 | } |
446 | } | |
447 | } | |
448 | ||
449 | /*++ | |
450 | ||
451 | Name: | |
452 | VmbusOnEventDPC() | |
453 | ||
454 | Description: | |
455 | DPC routine to handle events from the hypervisior | |
456 | ||
457 | --*/ | |
bd1de709 | 458 | static void |
3e7ee490 | 459 | VmbusOnEventDPC( |
775ef25e | 460 | struct hv_driver* drv |
3e7ee490 HJ |
461 | ) |
462 | { | |
454f18a9 | 463 | /* TODO: Process any events */ |
3e7ee490 HJ |
464 | VmbusOnEvents(); |
465 | } | |
466 | ||
467 | ||
468 | /*++ | |
469 | ||
470 | Name: | |
471 | VmbusOnISR() | |
472 | ||
473 | Description: | |
474 | ISR routine | |
475 | ||
476 | --*/ | |
bd1de709 | 477 | static int |
3e7ee490 | 478 | VmbusOnISR( |
775ef25e | 479 | struct hv_driver *drv |
3e7ee490 HJ |
480 | ) |
481 | { | |
ee3d7ddf | 482 | /* struct vmbus_driver *driver = (struct vmbus_driver *)drv; */ |
3e7ee490 HJ |
483 | |
484 | int ret=0; | |
454f18a9 | 485 | /* struct page* page; */ |
3e7ee490 | 486 | void *page_addr; |
eacb1b4d GKH |
487 | struct hv_message *msg; |
488 | union hv_synic_event_flags *event; | |
3e7ee490 | 489 | |
454f18a9 BP |
490 | /* page = SynICMessagePage[0]; */ |
491 | /* page_addr = page_address(page); */ | |
3e7ee490 | 492 | page_addr = gHvContext.synICMessagePage[0]; |
eacb1b4d | 493 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
3e7ee490 HJ |
494 | |
495 | DPRINT_ENTER(VMBUS); | |
496 | ||
454f18a9 | 497 | /* Check if there are actual msgs to be process */ |
3e7ee490 HJ |
498 | if (msg->Header.MessageType != HvMessageTypeNone) |
499 | { | |
500 | DPRINT_DBG(VMBUS, "received msg type %d size %d", msg->Header.MessageType, msg->Header.PayloadSize); | |
501 | ret |= 0x1; | |
502 | } | |
503 | ||
454f18a9 | 504 | /* TODO: Check if there are events to be process */ |
3e7ee490 | 505 | page_addr = gHvContext.synICEventPage[0]; |
eacb1b4d | 506 | event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT; |
3e7ee490 | 507 | |
454f18a9 | 508 | /* Since we are a child, we only need to check bit 0 */ |
7c369f40 | 509 | if (test_and_clear_bit(0, (unsigned long *) &event->Flags32[0])) |
3e7ee490 HJ |
510 | { |
511 | DPRINT_DBG(VMBUS, "received event %d", event->Flags32[0]); | |
512 | ret |= 0x2; | |
513 | } | |
514 | ||
515 | DPRINT_EXIT(VMBUS); | |
516 | return ret; | |
517 | } | |
518 | ||
454f18a9 | 519 | /* eof */ |